Press for making glass insulators.



F. N. ROEHRICH. PRESS FOR MAKING GLASS INSULATORS.

Patented M01120; m5.

1 APPLICATION FILED FEB. 5. 1908.

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I APPLICATION FILED FEB. 5, 1903- I 11 jl@@ %wfi I Patented Apr. 20, 11915.

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APPLICATION FILED FEB. 5, i908.

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F. N. HOEHRICH.

PRESS FOR MAKING GLASS INSULATORS.

APPLICATION FILED FEB. 55. 1908.

Patented. Apr. 20, 1915.

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PRESS FOR MAKING GLASS INSULATORS.

APPLICATION FILED FEB. 5| 190B.

Patented Apr. 20, 1915.

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F. N. ROEHRICH.

PRESS FOR MAKING GLASS INSULATORS.

APPLICATION FILED FEB. 5, 1908.

J h I Patented Apr. 20, 1915.

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PRESS FOR MAKING GLASS INSULATORS.

APPLICATION FILED FEB. 51 19 08.

Patented Apr. 20, 1915.

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PRESS FOR MAKING GLASS INSULATORS. APPLICATION FILED FEB. 5, I908.

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Patented @1220, 1915.

17 SHEETS-SHEET 9.

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F. N. ROEHRICH. PRESS FOR MAKING GLASS INSULAT ORS.

APPLICATION FILED FEB. 5| 190B.

Patented Apr. 20, 1915.

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PRESS FOR MAKING GLAS'S INSULATORS.

APPLICATION FILED FEB. 5, 1908.

Patented Ap1220, 1 .915.

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APPLICATION FILED FEB; 5, I908.

Patented Apr 20, 1915,

17 SHEETS-SHEET 12.

F. N. ROEHRICH.

PRESS FOR MAKING GLASS INSULATORS.

APPLICATION FILED FEB. 5, 1908.

Patented Apr. 20, 1915.

17 SHEETS-SHEET 13.

i i x y APPLICATION FILED FEB. 5. 190a.

Patented Apr. 20, 1915.

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APPLICATION FILED FEB. 5, 1908.

Patented Apr. 20, 11915.

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Patented Apr. 20, 1915'.

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a? vhm E. N. ROEHRICH. PRESS FOR MAKING GLASS INSULATORS.

FRANK. N. ROEHRICH, OF BROOKLYN, NEW YORK, ASSIGNOR TO THE BROOKFIELD GLASS COMPANY, A CORPORATION OF'NEW YORK.

PRESS FOR MAKING GLASS INSULATOBS.

insects.

Specification of Letters Patent.

Patented Apr. 20, 1915-.

Application filed February 5, 1908. Serial No. 414,383.

a citizen of the United States, and a resident of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Presses for Making Glass Insulators, of which the following is a specification.

My invention relates to presses for making glass insulators.

It has for its object to improve the methods and apparatus used in making glass insulators; to provide a new and improved automatic press for that purpose, one actuated by a fluid, preferably air, under pressure; also to provide new and improved means for forcing the screw plunger into the molten glass in the molds to form glass insulators and for withdrawing it from the finished insulators, also new and improved means for removing the finished insulators from the press; and also generally to improve, simplify and perfect parts of presses for making glass insulators.

My invention consists of the novel devices and methods herein shown and described.

Referring to the specific embodiment of my invention shown in the drawings, which accompany this application and form part hereof, Figure 1 is an elevation of the complete machine with parts broken away and certain parts omitted for sake of clearness. Fig. 2 is a vertical section of the machine with parts shown in elevation, a section being taken on line 22 of Fig. 3. Fig. 3 is a horizontal section taken on the line 33 of Fig. 1 and with most of the detail mechanism omitted for sake of clearness and also showing the devices for carrying the molten glass from the furnace to the molds. Fig. at is a horizontal section on line 44 of Fig. 1. Fig.5 is a section on line 55 of Fig. 1. Fig. 6 is an enlarged detail vertical section of a mold and the lower portion of the screw plunger and its operating devices. Fig. 7 is an enlarged detail section on line 7-7 .of Fig. 6. Fig. 8 is an enlarged detail elevation of the mold and its cooling pipes. Fig. 9 is a horizontal section on line 99 of Fig. 8 through the bottom part of the mold. Fig. 10 is an enlarged detail plan with-parts in section of the mold and devices for removing the insulator from the mold and placing it upon the carrier. Fig. 11 is an enlarged detail plan section of part of the do vices for removing the insulator from the mold. Fig. 12 is an elevation of the devices for removing the insulator from the mold.

Fig. 13 is a front elevation of the devices for carrying molten glass from the furnace to the mold. Fig. 14 is a vertical section of the same on the line 14 14 of Fig. 13. Fig. 15 is a plan of the same. Fig. 16 is a detail of the piston operating the device for carrying the molten glass from the furnace to the mold. Figs. 17 and 18 are details of the operating valve of the said piston. Fig. 19 is a detail horizontal section through one of the rotary air valves operating the different pistons. Figs. 2026 are diagrammatic representations showing the operating cycle of the rotary air valves of the pistons. Figs. 27 to 36 inclusive illustrate a modified form of my invention. Of these, Fig. 27 is a view partly in elevation and partly in section showing the screw plunger and mold operating devices of such modified form of construction. Fig. 28 is an elevation partly in section showing the screw plunger and its operating devices in the position when the screw plunger is inserted in the molten glass in the mold: Fig. 29 is a vertical section of the same parts with the screw plunger and connecting parts in their uppermost positions. Fig. 30 is a horizontal section on line 30-3O of Fig. 27, with certain parts omitted. Fig. 31 is an enlarged horizontal section on line 3131 of Fig. 28. Fig. 32 is a detail plan view of the cylinder and connectautomatic, most of the operations being .performed through the pressure of compressed air. I have shown my improvementsas embodied in the drawings in connection with a turn table press provided with four molds, although it will, of course, be understood that any suitable press may be employed 'and any suitable numberof molds may be used.

1 is the rotary turn table upon whichare mounted four molds 2, 2. Turn table 1 retates around a hollow stand-pipe, fast in stationary standard 4 rooted to the base plate 5 of the press, the source of supply of compressed air. represented by pipe 6, which may connect with any suitable means for supplying the air under pressure. Pipe 6 is sc e ed nto standard 4: and p ns int a hollow space 7 in the bottom of the standard, I which communicates with the hollow interior of stand pipe 3.

8 is a hand wheel for a valve in pipe'6 to control the supply. Pipe 6 is also supported, as shown by support 9, secured to the" base plate. The compressed air is supplied to the interior of stand pipe 3 through pipe 6 under such pressure and in such amounts as may be desired. From stand pipe it passes to the various valves for operating different parts of the apparatus, as will be presently described.

10 is. the main driving shaft, receiving power through pulley 11 from any source of power. Turn table 1 is rotated from this shaft through bevel gear 12,; meshing with a circular gear 13, cut on circular plate 14 bolted to the under side of the base of the rotary turn table (see Fig. 2). Ball bearings 15 are interposed between plate 14 and stationary plate 16 forming the upper part of standard 4.

17 is a worm on shaft 10 meshing with a worm wheel 18 fast on shaft 19, the shaft carrying at its other end a wheel 20, around which passes an endless chain or carrier 21 for removing the finished insulators, as will be later described. Motion is transmitted to the endless carrier through the worm wheel and wheel 20. The endless chain 21 is only shown in part.

Molten glass may be supplied to the mold in any suitable manner by hand or by any suitable means. The devices shown for this purpose are particularly illustrated in Figs. 1, 3, 4, 5 and 13 to 18 inclusive. Molten glass is supplied from. a furnace (not shown). and drops upon one of the curved surfaces 22 of a rotary wheel 23, mounted on a sleeve 24, loose on shaft 25, carriedin any suitable supports (not shown). An intermittent rotary motion is given to wheel 23 by means of a toothed sector 26, loose on shaft 25 and carrying a pawl 27 adapted to engage with the teeth on toothed wheel 28, fast on sleeve 24, sector 26 engaging the teeth ofa rack 29 on the end .of piston rod 30 secured to piston 31, working in cylinder 32; Spring 33, surrounding rod 30 and lying between a cap 34 at the open end of the cylinder 32 and the piston 31 tends to keep the piston 31 in the lower end of cylinder 32, as shown in Fig.

i 16. The piston 31 is moved upward to rotate wheel 23 by compressed air. This is supplied from pipe 6 through small pipe 35, see Fig. 2, provided with a valve 36, pipe 35 opening into chamber of cylinder 37.

38.and 39 are two valves for ports 40 and 41. Valves 38 and 39 are mounted on a rod 42, which carries at its end a roller 43, held in engagement with the periphery of turn table 1 by means of a spring 44 lying between the end of cylinder 37 and the collar and wheel 23 one point.

45 secured to the rod. Normally the valves are in the position shown in Fig. 18, with valve 38 closing port 40. Whenever roller 43 engages a short cam 46 on the periphery of turn table 1, see Fig. 3, rod 42 is pushed inward, opening port 40 and closing port 41. The compressed air now rushes in from pipe 35 and chamber 36 through port 40, into chamber 47 and through orifice 48 into cylinder 32 below piston 31, forcing the piston up and causing rack 29, through sector 26 and pawl 27, to rotate ratchet wheel 28 As shown, this is one-third of a revolution. A cam 46 is provided for each mold and is so placed, see Fig. 5, that wheel 23 will be given this partial rotary movement when a mold is brought into proper position to receive molten glass. This position is indicated in Fig. 3 by the mold at the left side of the figure. Each cam 46 is made just long enough to give the suflicient amount of compressed air to force piston 31 to the limit of its stroke. When the roller 43 passes off the cam, spring 44 closes port 40 and opens port 41. This permits the air below piston 31 to pass out into chamber 48 of cylinder 37, which is open to the air. Thereupon spring 33 returns piston 31 to its normal position. The consequent downward movement of rack 29 will turn sector 26 backward, but this will not affect wheel 23, as pawl 27 will slip idly over the teeth of gear wheel 28. At the proper time an intermittent feed is thus given to wheel 23. The flow of molten glass into the curved or cup surfaces 22 .of the wheel will be regulated, of course, as desired.

Each charge of molten glass will be discharged from a cup surface 22 into trough 49, whence it will slip onto piece 50, which is practically a continuation of the trough and thus onto a piece 51 secured to the mold for guiding the molten glass into the mold itself. Piece 51 is only diagrammatically represented, see Fig. 1, as it is a well known construction. Piece is secured at 52 to a bracket 53, secured to the framework. Piece 50 can be adjusted on center 52 to suit different heights of molds. As shown, a space is preferably left between parts 49, 50 and 51 for the escape of water and other foreign material. Any suitable means of cooling the surfaces over which the molten glass passes may be used. As shown, I have indicated a hollow space 54 in the interior of wheel 23 and a hollow space 55 in the interior of trough 49 to receive any suitable cooling substance. I

56 is a scraper for holding back any excess of molten glass. It is mounted on a sliding piece 57 having a hollow space 58 to receive a cooling fluid, sliding piece 57 be ing carried at each end on a square piece 59 adapted to Slide in guideways 60 formed between the part of the body of trough 49 and a rail 61 secured to it, as shown in Fig, 14.

62 is a bracket secured to trough 49 and having a cup-shaped part 63. There are two of these brackets, 62. In the cups63. of the brackets rest studs 64 projecting-from both sides of a block 65 fastened to the lower part of rod 66. The upper end of the rod carries a blockv 67, to which, at 69, ispivotedan arm 68. Arm 68 isfast to sliding piece 57. is. a spring encircling rod 66 between block 67 and a bracket 71, through which rod 66 passes and which bracket forms a bearing for it. In case any, hard foreign substance, or any hard lump of glass presses against scraper 56, breakage of the parts is avoided by the above arrangement, thescraper With sliding piece 57 being free, under sufficient pressure, to slide downward in the guideway 60, rod 66 rocking to the right, as viewed in Fig. 14, insuch operation. When the obstruction has passed, spring 70 will restore the parts to their normal positions.

The steps of forcing theiscrew plunger into the molten glass in the mold bringing down the former, withdrawing the former and screw plunger, opening the fnold, removing the insulator therefrom,closing the mold and restoring the parts generally to their original positions are performed by apparatus actuated by the compressed air. These various steps are taken in certain predetermined order. As shown, the different setsof apparatus are actuated by compressed air by means of a series ofvalves which are opened and closed in a predetermined order. Figs. 20 to 26 inclusive represent diagrammatically the operation of such valves and the sequence of their operation. I will now describe them in the order in which they are performed in the operation of the machine. After the glass has been received in the mold, the first step is to bring down the former and screw plunger and force the latter into the molten glass in the mold. The apparatus for accomplishing this is especially illustrated in Figs. 1, 2, 3, 6, 19 and 20. The stand pipe 3 has a series of outlets 72, 72 leading. into an annular chamber 7 3, formed in a series of rings 74 surrounding the stand pipe at each valve. These rings are fast to the stand pipe and do not rotate. Each chamber 73 has a single orifice or outlet 75. It has also on its outer surface a passageway 76, which communicates at its lower end with the atmosphere, as shown at the top of Fig. 2. A series of valves are provided for permitting compressed air to pass from the stand pipe to the difl'erent pistons, which operate different parts of the apparatus.

77 is the one of these valves used in forcing the former and screw plunger into contact with the glass. lit is secured to the upper part of the rotary turntable, as rhown in Fig. 2 and rotates with that table. In the rotation of the turn table, after molten, glass has. been put into a mold, the outlet" 78, in

valve '7 7 comes opposite outlet 7 5 of ring 74. Y Y

Connecting with outlet 78 is a pipe 79 0011- down the piston. This forces. down the screw plunger 83, causing it to enter the molten glass in the mold to form the screw of the insulator. It also forces down the former 84 y The shaft of the screw plunger is composed of three parts, the upper part 85, secured to piston 82 and provided at its lower end with interior screw-threads 86, the portion 87 screw-threaded and fitting into the interior screw threads 86. Pin 88 is secured to the upper end of plunger 83 and projects sidewise through a slot 89 in a third part 90 of the shaft of the plunger. Part 85 has secured to itabra'cket 91 (see Fig. 1), with two downwardly projecting rods 92, 92 carrying at their lower end a similar bracket 93. Surrounding each of the rods 92 is a loose sleeve 94, each having a collar 95 at its upper end, between which and bracket 91 is a spring 96. Both the rods 92 and sleeves 94 pass through an opening in a bracket 97,

secured to one of the uprights 98 between the base and upper part of the turn table. Bracket 93 also has two downwardly projecting pins 99. Loosely mounted upon these, at their lower .end, is a cross-piece 100, to which the former 84 is secured. A spring 101 encircles each pin 99. These permit the former to stop in its downward movement before the plunger shaft ceases its downward movement in case an excess of glass has been put into the mold. The outlets 78 and are so adjusted in size that in the regular rotation of the turn table the outlet 78 will have passed outlet 75 by the time suflicient air has been admitted 'to cylinder 81 to force the screw plunger and the former down into the mold in the proper way. Immediately after sufficient air has been admitted for thispurpose, the forward end of outlet 7 8 comes into line with exhaust outlet 76, whereupon thev compressed air in cylinder 81 exhausts into the atmosphere. As this takes place; the former 84 is immediately lifted a slight distance from the molten glass by means of the springs 96 which had been compressed in the downward movement of the parts. This prevents injury to the molten glass from too long a contact between the former and the glass. The operation of these springs also, of course, slightly lifts piston 82.

It will, of course, be understood that each mold is provided with its cylinder 81 and 70 'nectingwithaninlet leading to the upper 

